Attitudes on this vary depending on culture and generation.
Such thinking was more common in America my father's generation ...that's the WWII generation, he's 96. He often talks to me about some of his outstanding teachers in high school and college. But he also talks a lot about no matter how knowledgeable and inspiring the teacher was it was up to the student to shoulder the responsibility to do the work necessary to succeed.
My old Chinese sifu had similar ideas. He explained it this way. We paid him to present the knowledge he felt we were ready to receive, but whether we trained hard enough to learn it well was entirely up to us. He felt it was a grave mistake, all too common in these modern times, especially in western nations, that it was up to the sifu to motivate the student to train. And he had a point.
I am a school teacher in a public high school. In the state and district where I work, individual teachers, and the entire school collectively are evaluated according to student performance and test scores. If the students perform poorly in individual classes, the teacher receives lower pay, and if they do poorly on state mandated standardized tests, the entire school is also penalized in ranking and funding. These standardized tests do
not, however, affect the students' grades.
When I reprimanded one student for putting his head down and napping during a review session prior to one of the aforementioned tests, he quipped, "Why should I bother listening to you? If I fail it won't affect
my grade. I hear it will affect
your salary though! Ha ha ha..."
I looked straight at him and told him that
he was exactly right, and that it was a shame because
in the long run he had more to lose than I. Needless to say that after 26 years working for that district, I have a couple of reprimands "in my file" for speaking my mind to students. But I also had a lot of support from my principal. Unfortunately he just retired.
So, back to the OP. Do you have similar policies at your dojos, dojangs, kwoons, and gyms? If students slack off, do you think the teacher is to blame?